TOPIC

E-commerce System Design Case Studies

InterviewSkool tracks 11 E-commerce case studies with architecture diagrams, scale estimates, and deep dives.

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Topics

Distributed Systems 90Real-time 51Storage 43Data Pipelines 42API Design 41Databases 38Caching 37Security 32AI / ML 23Algorithms 20Scheduling 20Search 19Event Driven 14Fintech 14Payments 11Geospatial 11Analytics 11Observability 11E-commerce 11Messaging 10CDN 9Concurrency 8Ads 8Frontend 8Booking System 6Networking 5IoT 4Media 3Media Streaming 3Collaboration 3Rate Limiting 2
E-commerceClear all
Coffee Ordering System with Real-Time Notifications
6 min readE-commerceReal-timeAPI Design
Beginner▶ Mock
Digital Game Store and Distribution Platform (Steam)
6 min readE-commercePaymentsCDN
Intermediate▶ Mock
E-commerce Tables and Indexes for Recent-Spend Queries
3 min readDatabasesE-commerce
Beginner▶ Mock
E-commerce Shopping Website (and Fixing Cart Latency)
5 min readE-commerceCachingDatabases
Intermediate▶ Mock
Faceted Product Search at Large Scale (Amazon)
4 min readSearchE-commerceDistributed Systems
Intermediate▶ Mock
Food and Quick-Commerce Delivery Platform (Uber Eats / DoorDash)
6 min readGeospatialReal-timeE-commerce
Advanced▶ Mock
Multi-Carrier Parcel Shipping System
4 min readE-commerceAPI DesignEvent Driven
Intermediate▶ Mock
Online Bookstore with Price Aggregation
7 min readE-commerceAPI DesignCaching
Intermediate▶ Mock
Perishable-Goods Inventory and Location Tracking
3 min readE-commerceDatabasesEvent Driven
Intermediate▶ Mock
Price Drop Tracker (CamelCamelCamel)
5 min readE-commerceSchedulingData Pipelines
Intermediate▶ Mock
E-commerce Product Catalog and Price Updates
6 min readE-commerceCachingDatabases
Intermediate▶ Mock

Frequently Asked Questions

What is E-commerce in system design?

E-commerce is a core system design topic covered in 11 case studies on InterviewSkool. It appears frequently in FAANG interviews, especially at Google, Amazon, and Meta.

How should I prepare E-commerce for system design interviews?

Study the case studies above, focusing on architecture trade-offs, scale estimates, and API designs. Practice explaining your decisions aloud — this is exactly what interviewers evaluate.

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